9.8/((7.1-5.6)/0.75).
9.8/((7.1-5.6)/0.75)．
<gadget id="calculator">7.1 - 5.6</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 / 0.75</gadget>
<output>2</output>

<gadget id="calculator">9.8 / 2</gadget>
<output>4.9</output>

<result>4.9</result>