How much is 3 meters less than 4 meters?
3米比4米少多少．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>