The school organized students to donate books to the children in the disaster area, of which story books accounted for 60%, picture albums accounted for 30%, and picture books accounted for 60 fewer than story books. How many books did the students donate in total? (Solution of column equation)
学校组织同学们为灾区小朋友捐书，其中故事书占60%，画册占30%，画册比故事书少60本．同学们一共捐了多少本书？(列方程解)
<gadget id="calculator">0.6 - 0.3</gadget>
<output>0.3</output>

<gadget id="calculator">60 / 0.3</gadget>
<output>200</output>

<result>200</result>