=7.8÷(0.26×0.03)=7.8÷0.0078=1000
原式=7.8÷(0.26x0.03)=7.8÷0.0078=78000÷78=1000供参考。
7.8÷0.26÷0.03=7.8÷(0.26×0.03)=7.8÷0.0078=1000