The number 7.2 more than 5 times x is 9.8, find x. (Solution of column equation)
比x的5倍多7.2的数是9.8，求x．(列方程解)
<gadget id="calculator">9.8 - 7.2</gadget>
<output>2.6</output>

<gadget id="calculator">2.6 / 5</gadget>
<output>0.52</output>

<result>0.52</result>