Calculation: 29.78-22.78/3.4=how much.
计算：29.78-22.78/3.4=多少．
<gadget id="calculator">22.78 / 3.4</gadget>
<output>6.7</output>

<gadget id="calculator">29.78 - 6.7</gadget>
<output>23.08</output>

<result>23.08</result>