There is a pile of Go pieces, the number of white pieces is 3 times that of black pieces, take out 7 white pieces and 4 black pieces each time, after several times (less than ten times), the remaining white pieces are 11 times as many as black pieces. It turns out how many white sons are there.
有一堆围棋子，白子颗数是黑子的3倍，每次拿出7颗白子、4颗黑子，经过若干次(不到十次)后，剩下的白子是黑子的11倍．原来白子有多少颗．
<gadget id="calculator">37 * 3</gadget>
<output>111</output>

<result>111</result>