1). 125 / 2000 * 32 * 47 = 94
125 / 2000 = 0.0625
0.0625 * 32 = 2
47 * 2 = 94
2). 37 / 222 * 18 * 7 = 21,000000042
37 / 222 = 0,166666667
0,166666667 * 18 = 3,000000006
3,000000006 * 7 = 21,000000042
3). (486 * 11 - 86 * 11) / 220 = 20
486 * 11 = 5346
86 * 11 = 946
5346 - 946 = 4400
4400 / 220 = 20
4). 21 < X < 43
X = 22 - 42 (включительно)