When the little sloppy is calculating: "60-★*0.8", because he calculates "-" first and then "*", how much is the difference from the correct answer.
小马虎在计算："60-★*0.8"时，由于他先算"-"再算"*"，因此与正确答案结果相差多少．
<gadget id="calculator">10 * 0.8</gadget>
<output>8</output>

<gadget id="calculator">60 - 8</gadget>
<output>52</output>

<gadget id="calculator">60 - 10</gadget>
<output>50</output>

<gadget id="calculator">50 * 0.8</gadget>
<output>40</output>

<gadget id="calculator">52 - 40</gadget>
<output>12</output>

<result>12</result>