The store shipped a batch of baby carriages, sold 3/10 of the total number on the first day, and sold 1/2 of the number on the second day, leaving 110 unsold. How many strollers did the store ship?
商店运来一批童车，第一天卖出总数的(3/10)，第二天卖出的辆数相当于第一天卖出的(1/2)，还剩110辆没卖出，商店运来多少辆童车？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/10) * (1/2)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/10) - (3/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">110 / (11/20)</gadget>
<output>200</output>

<result>200</result>