The oral calculation competition was held in the sixth grade. When Xiaofang still had (2/3) of the competition questions left, Xiao Ming did 40% of the competition questions. At this time, Xiao Ming’s remaining questions were 4 less than Xiaofang’s. How many oral calculation questions are there?
六年级举行口算比赛，小芳还剩下比赛题目的(2/3)时，小明做了比赛题目的40%，这时小明剩下的题数比小芳剩下的少4道，比赛的口算题共有多少道？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/3) - (3/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">4 / (1/15)</gadget>
<output>60</output>

<result>60</result>