There is a pile of coal in the cafeteria. After using up (2/3), another 48 tons are brought in. At this time, the factory has exactly the same amount of coal as before. How many tons of coal does the factory have?
食堂有一堆煤，用掉(2/3)后，又运来48吨，这时工厂的煤正好与原来一样多，这个工厂原有煤多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">48 / (2/3)</gadget>
<output>72</output>

<result>72</result>