The little sloppy calculated 7(m+6) carelessly as 7m+6, and the calculated result was much less than the original one.
小马虎在计算7(m+6)时粗心地算成7m+6，计算结果比原来少了多少．
<gadget id="calculator">42 - 6</gadget>
<output>36</output>

<result>36</result>