3.60 Найдите произведение:

1. а) $$54 \times 36 = 1944$$
2. б) $$47 \times 75 = 3525$$
3. в) $$325 \times 38 = 12350$$
4. г) $$138 \times 27 = 3726$$
5. д) $$302 \times 405 = 122310$$
6. e) $$120 \times 3500 = 420000$$
7. ж) $$1207 \times 6322 = 7629654$$
8. з) $$4006 \times 4050 = 16224300$$