Xiao Li mistakenly regards (4+★)*15 as 4+★*15, how much is the difference between his calculated result and the correct one.
小李把(4+★)*15错看成了4+★*15，他算出的结果与正确的得数相差多少．
<gadget id="calculator">60 - 4</gadget>
<output>56</output>

<result>56</result>