The sum of the sides of a matchbox is 32 cm. 4cm, width 3cm, height in cm.
一个火柴盒它的棱长总和是32cm．4cm，宽3cm，高多少cm．
<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">8 - 7</gadget>
<output>1</output>

<result>1</result>