Aunt Li bought a piano at a discounted price of 10% and actually paid 43,920 yuan. How much was the original price of this piano?
李阿姨以九折的优惠价买了一架钢琴，实际付了43920元，这架钢琴原价是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">43_920 / (9/10)</gadget>
<output>48_800</output>

<result>48_800</result>