#### Answer

(a)
Switch on the calculator, and enter the value 197 first, then press the division button and enter the next value, which is 800. Press the “equal to” sign button to obtain the answer as 0.24625.
(b)
Switch on the calculator, and enter the value 4539 first, then press the division button and enter the next value, which is 3125. Press the “equal to” sign button to obtain the answer as 1.45248.
(c)
Switch on the calculator, and enter the value 7 first, then press the division button and enter the next value, which is 6250. Press the “equal to” sign button to obtain the answer as 0.00112