30% of a number is 2.4 more than 1.2, what is this number? (Solution of column equation)
一个数的30%比1.2多2.4，这个数是多少？(列方程解)
<gadget id="calculator">1.2 + 2.4</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 / 0.3</gadget>
<output>12</output>

<result>12</result>