There are 30 black pieces, and there are 2 less white pieces than black pieces (3/5), how many black and white pieces are there in total?
黑棋子有30颗，白棋子比黑棋子的(3/5)还少2颗，黑白棋子共有多少颗．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 * (3/5)</gadget>
<output>18</output>

<gadget id="calculator">18 - 2</gadget>
<output>16</output>

<gadget id="calculator">16 + 30</gadget>
<output>46</output>

<result>46</result>