负一又三分之二除以四分之三乘(负零点六)乘以一又四分之三除以一点四乘以(负五分之二)
=-5/3×4/3×(-3/5)×7/4×5/7×(-2/5)
=-(5/3×3/5)×(4/3×7/4)×(5/7×2/5)
=-7/3×2/7
=-2/3