Xiao Ming did 40 crossing problems at night, which is 1/3 more than planned. How many crossing problems does he plan to do?
小明晚上做了40道口算题，比计划多做了(1/3)，他计划做多少道口算题？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">40 / (4/3)</gadget>
<output>30</output>

<result>30</result>