When electing outstanding team representatives, a certain school elected 240 representatives, including 154 representatives from the fifth grade, and 106 female representatives from the whole school. At least how many of the fifth grade representatives are female representatives.
在选举优秀队员代表时，某校选出代表240名，其中五年级代表154名，全校女代表106名，五年级代表中至少有多少人是女代表．
<gadget id="calculator">240 - 154</gadget>
<output>86</output>

<gadget id="calculator">106 - 86</gadget>
<output>20</output>

<result>20</result>