40%X-2.8=7.6.
40%X-2.8=7.6．
<gadget id="calculator">10.4 / 0.4</gadget>
<output>26</output>

<gadget id="calculator">0.4 / 0.4</gadget>
<output>1</output>

<gadget id="calculator">26 / 1</gadget>
<output>26</output>

<result>26</result>