Assign some saplings to the students in class one, class two, and class three according to 2:3:5 to plant, how much less saplings in class one than class three.
把1些树苗按2：3：5分配给一班、二班、三班的学生去种植，一班比三班的树苗少多少．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>