240 is 60 more than half of x.
240比x的一半多60．
<gadget id="calculator">240 - 60</gadget>
<output>180</output>

<gadget id="calculator">60 - 60</gadget>
<output>0</output>

<gadget id="calculator">0.5 + 0</gadget>
<output>0.5</output>

<gadget id="calculator">180 / 0.5</gadget>
<output>360</output>

<result>360</result>