229 372 ∶ 286 = 802
802 × 506 = 405 812
282 370 ∶ 302 = 935
935 ∶ 85 = 11
32 × 18 = 576
195 840 ∶ 576 = 340
301 608 ∶ 426 = 708
538 × 708 = 380 904
Ответ: 1) 405812; 2) 11; 3) 340; 4) 380904.