400000÷32÷25÷125=400000÷(32×25×125)=400000÷【(4×25)×(8×125)】=400000÷【100×1000】=400000÷100000=4
解析:400000÷32÷25÷125=400000÷(32x25x125)=400000÷(25x4x8x125)=400000÷(100x1000)=400000÷100000=4