There are three piles of Go pieces, 90 pieces in each pile. There are as many white pieces in the first pile as there are black pieces in the second pile, and (3/5) of the third pile are black pieces. How many black pieces are there in total?
有三堆围棋子，每堆90枚，第一堆中的白子与第二堆中的黑子一样多，第三堆中有(3/5)是黑子，一共有多少枚黑子？
<gadget id="calculator">54 + 90</gadget>
<output>144</output>

<result>144</result>