5.61乘9.9乘0.38除(0.19乘3又10分之3乘1.1)
=5.61x9x1.1x0.19x2÷(0.19x3.3x1.1)
=5.61x9x2÷3.3
=5.5x1.1x3x2÷3.3
=5.5x2
=11