A pack of toffee accounts for (1/3) of the total number of pieces. After putting in 18 pieces of fruit candy, toffee accounts for (2/9) of the total number. How many pieces of toffee are there?
一包奶糖占总块数的(1/3)，放入18块水果糖后，奶糖占总数的(2/9)，奶糖有多少块？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">18 * (2/9)</gadget>
<output>4</output>

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

<gadget id="calculator">(1/3) - (2/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">4 / (1/9)</gadget>
<output>36</output>

<gadget id="calculator">36 * (1/3)</gadget>
<output>12</output>

<result>12</result>