Xiao Ming has done 40 math problems, and the ones he has not done are 50% more than the ones he has done. Ask Xiao Ming which problem he is doing now?
小明做40道数学题，没有做的比已经做的多50%，问小明现在在做第几道题？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + 1 + (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">40 / (5/2)</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>