运行动作前面先选中计算式
(3上顶+5下底)*3高/2 → 执行后后:(3上顶+5下底)*3高/2 =12
(5+6)长度*(3+2)宽度 → 执行后后:(5+6)长度*(3+2)宽度=55
52[3.25段]+31[6.5段] → 执行后后:52[3.25段]+31[6.5段] =83
(56+3)*2 → 执行后后:(56+3)*2=118