What is the result of subtracting the quotient of 30 divided by 30 from 30 and adding 30 to the difference?
30减去30除以30的商，所得的差再加上30，结果是多少．
<gadget id="calculator">30 / 30</gadget>
<output>1</output>

<gadget id="calculator">30 - 1</gadget>
<output>29</output>

<gadget id="calculator">29 + 30</gadget>
<output>59</output>

<result>59</result>