Решение:

• a) $$25 \times 134 \times 4 = (25 \times 4) \times 134 = 100 \times 134 = 13400$$
• б) $$8 \times 236 \times 125 = (8 \times 125) \times 236 = 1000 \times 236 = 236000$$
• в) $$30 \times 14 \times 20 = (30 \times 20) \times 14 = 600 \times 14 = 8400$$
• г) $$500 \times 62 \times 200 = (500 \times 200) \times 62 = 100000 \times 62 = 6200000$$

Ответ:

• a) 13400
• б) 236000
• в) 8400
• г) 6200000