Try: 3.6 X 2.9 using the CI scale

- Cursor to 3.6 on D
- Slide to 2.9 at cursor on CI

Try: 3.6 X 2.9 using the C and CF and DF scales

- Right index of C to 3.6 on D Cursor to 2.9 on CF

Try: 3.6 X 2.9 using only CF and DF

- Slide CF index under 3.6 on DF
- Cursor to 2.9 on CF

Try: 3.6 X 2.9 using only the A and B scales

- Left index of B to 3.6 on A Cursor to 2.9 on B

Try: 402 X 0.071

- Right index of C to 402 on D
- Cursor to 7l on C
- Read 285 on D at cursor
- Decimal point estimate #1: 400 X 0.1 = 40.
- Decimal point estimate #2: 402 is about 4 X 102. 0.071 is about 7 X 10-2.

Taking the digits first, then the powers of ten second, we see: 4 X 7 = 28. 102 X 10-2 = 100 =1. 28 X 1 = 28. Answer is about 28.