Условие:

90 * 6;
900 * 6;
9000 * 6;
810 : 9;
8100 : 9;
81000 : 9;
1409 * 5;
1507 * 8;
1608 * 8;
88 : 22 * 10;
77 : 11 * 100;
96 : 32 * 1000.

90 * 6 = 540;
900 * 6 = 5400;
9000 * 6 = 54000;
810 : 9 = 90;
8100 : 9 = 900;
81000 : 9 = 9000;
1409 * 5 = 14045 = 95;
1507 * 8 = 15056 = 94;
1608 * 8 = 16064 = 96;
88 : 22 * 10 = 4 * 10 = 40;
77 : 11 * 100 = 7 * 100 = 700;
96 : 32 * 1000 = 3 * 1000 = 3000.