What is the difference between 42 and (6/7) of 42?
42与42的(6/7)的差是多少？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">42 * (6/7)</gadget>
<output>36</output>

<gadget id="calculator">42 - 36</gadget>
<output>6</output>

<result>6</result>