Pack a number of table tennis balls in four boxes, among which (1/5) is placed in box A, (1/3) is placed in box B and box C is the total number of table tennis balls in box A and box B 75% of the box, put 10 table tennis balls in the box, how many table tennis balls are there in total?
把若干个兵乓球分装在四个盒子里，其中(1/5)放入甲盒，(1/3)放入乙盒放入丙盒的乒乓球是甲、乙两盒乒乓球总数的75%，丁盒放入10个乒乓球，乒乓球共有多少个．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/5) + (1/3)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(8/15) * (3/4)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/5) - (1/3) - (2/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">10 / (1/15)</gadget>
<output>150</output>

<result>150</result>