Xiao Ming practiced 100 characters in the morning and 140 in the afternoon. The number of characters practiced today is equivalent to (2/3) yesterday. How many characters did Xiao Ming practice yesterday?
小明今天上午练了100个字，下午练了140个字，今天练字的个数相当于昨天的(2/3)，小明昨天练了多少个字？
<gadget id="calculator">100 + 140</gadget>
<output>240</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">240 / (2/3)</gadget>
<output>360</output>

<result>360</result>