The school basketball team has 20 members. The football team has more members than the basketball team (3/4) and the track and field team (5/7). How many people are there on the school track and field team?
学校篮球队有20名队员，足球队的人数比篮球队多(3/4)，同时又是田径队人数的(5/7)．学校田径队有多少人？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">20 * (7/4)</gadget>
<output>35</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">35 / (5/7)</gadget>
<output>49</output>

<result>49</result>