To build a rectangular swimming pool with a length of 80m and a width of 55m, if an average of 5500d㎡ is built every day, how many days will it take?
建一个长80m，宽55m的长方形游泳池，如果平均每天建成5500d㎡，需几天建成？
<gadget id="calculator">5_500 / 100</gadget>
<output>55</output>

<gadget id="calculator">55 / 55</gadget>
<output>1</output>

<gadget id="calculator">80 * 1</gadget>
<output>80</output>

<result>80</result>