3.9 * 14.7-3.9 * 4.7 1.25 * 3.2 * 2.5 3.2 * 101 as simple as possible

3.9 * 14.7-3.9 * 4.7 1.25 * 3.2 * 2.5 3.2 * 101 as simple as possible

3.9*14.7-3.9*4.7
=3.9X(14.7-4.7)
=3.9X10
=39
1.25*3.2*2.5
=1.25X(8X0.4)X2.5
=(1.25X8)X(0.4X2.5)
=10X1
=10
3.2*101
=3.2X(100+1)
=3.2X100+3.2X1
=320+3.2
=323.2
Hope to adopt

The simple calculation of 0.96 × 101 3.69 × 9 + 3.69 2.14 × 1.25 × 0.8 2.5 × 3.2

　　0.96×101
　　=0.96×（100+1）
　　=0.96×100+0.96×1
　　=96.96
　　3.69×9+3.69
　　=3.69×（9+1）
　　=3.69×10
　　=36.9
　　2.14×1.25×0.8
　　=2.14×（1.25×0.8）
　　=2.14×1
　　=2.14
　　2.5×3.2
　　=2.5×4×0.8
　　=10×0.8
　　=8

Simple calculation 1.6 × 2.8 × 1.25

1.6×2.8×1.25
=(0.2×8)×2.8×1.25
=（0.2×2.8）×（8×1.25）
=0.56×10
=5.6

How can 5.6/1.25/0.8/2.5/0.4 be easily calculated?

5.6÷1.25÷0.8÷2.5÷0.4
=5.6÷（1.25×0.8）÷（2.5×0.4）
=5.6÷1÷1
=5.6