Columnar calculation: What is the number 2.4 that is 4 times greater than 1.2?
列式计算：比1.2的4倍多2.4的数是多少？
<gadget id="calculator">1.2 * 4</gadget>
<output>4.8</output>

<gadget id="calculator">4.8 + 2.4</gadget>
<output>7.2</output>

<result>7.2</result>