Answer
$$G \frac{m_{1} m_{2}}{d^{2}} = 9 \times G \frac{m_{1} m_{2}}{(3 d)^{2}} $$
Your weight at the surface is 9 times your weight at the top of the (unreasonably tall) ladder.
Conceptual Physics (12th Edition)
by Hewitt, Paul G.
Published by
Addison-Wesley
ISBN 10:
0321909100
ISBN 13:
978-0-32190-910-7
Chapter 9 - Think and Solve - Page 178: 39
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