Divide 100 people into four teams, the number of the first team is 1 (1/3) times the number of the second team, and 1 (1/4) times the number of the third team, find the number of the fourth team.
把100个人分成四队，第一队人数是第二队人数的1(1/3)倍，是第三队人数的1(1/4)倍，求第四队的人数．
<gadget id="calculator">100 - 20 - 15 - 16</gadget>
<output>49</output>

<result>49</result>