Xiao Ming calculates 50-40/5 as (50-40)/5, what is the difference between the number he calculated and the correct number
小明将50-40/5按(50-40)/5进行计算，他算出的得数与正确的得数相差多少
<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">50 - 8</gadget>
<output>42</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<gadget id="calculator">42 - 2</gadget>
<output>40</output>

<result>40</result>