1 5

* 2 6

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9 0-5 * 6 = 30, so the unit is 0, and 3 is entered; 1*6=6, so the ten digits are 6+3 (3 just entered) = 9.

3 0-2 * 5 = 10, so the decimal number is 0, enter1; 1*2=2, so the hundreds are 2+ 1 (just entered 1)= 3.

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3 90- Add up and down.