Answer
Assuming that variables $a, b, c,$ and $d$ are stored in memory locations $100,$
$101,102,$ and $103,$ respectively:
$\begin{array}{llll}
{\text {Memory}} & {\text {} } & {\text {Address} } & {\text {} }\\
{\text {Location }} & {\text {Op Code} } & {\text {Field} } & {\text {Comment} }\\
{50} & {\text { LOAD }} & {101} & {\text { Register } \mathrm{R} \text { contains the value of } b} \\
{51} & {\text { MULTIPLY }} & {103} & {\text { R now contains the product } b \times d} \\
{52} & {\text { STORE }} & {101} & {b \text { now has the value } b \times d} \\
{53} & {\text { LOAD }} & {102} & {\text { R contains the value of } c}\\
{54} & {\text { DIVIDE}} & {103} & {\text { R now contains the quotient c/d} }\\
{55} & {\text { STORE}} & {103} & {\text { d now has the value c/d} }\\
{56} & {\text { LOAD}} & {101} & {\text { Load the product b 3 d back into R} }\\
{57} & {\text { SUBTRACT}} & {103} & {\text { R now contains (b 3 d) 2 (c/d)} }\\
{58} & {\text { STORE}} & {100} & {\text { Store the result into a} }\\
\end{array}\\$
Work Step by Step
Assuming that variables $a, b, c,$ and $d$ are stored in memory locations $100,$
$101,102,$ and $103,$ respectively:
$\begin{array}{llll}
{\text {Memory}} & {\text {} } & {\text {Address} } & {\text {} }\\
{\text {Location }} & {\text {Op Code} } & {\text {Field} } & {\text {Comment} }\\
{50} & {\text { LOAD }} & {101} & {\text { Register } \mathrm{R} \text { contains the value of } b} \\
{51} & {\text { MULTIPLY }} & {103} & {\text { R now contains the product } b \times d} \\
{52} & {\text { STORE }} & {101} & {b \text { now has the value } b \times d} \\
{53} & {\text { LOAD }} & {102} & {\text { R contains the value of } c}\\
{54} & {\text { DIVIDE}} & {103} & {\text { R now contains the quotient c/d} }\\
{55} & {\text { STORE}} & {103} & {\text { d now has the value c/d} }\\
{56} & {\text { LOAD}} & {101} & {\text { Load the product b 3 d back into R} }\\
{57} & {\text { SUBTRACT}} & {103} & {\text { R now contains (b 3 d) 2 (c/d)} }\\
{58} & {\text { STORE}} & {100} & {\text { Store the result into a} }\\
\end{array}\\$
