A box of chocolates has been eaten (7/10), and there are only 18 pieces left. How many pieces are there in this box of chocolates?
一盒巧克力，已经吃了(7/10)，只剩下18块，这盒巧克力原来有多少块？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">18 / (3/10)</gadget>
<output>60</output>

<result>60</result>