The current price of a commodity is 1800 yuan, which is 10% lower than the original price. How much is the original price of this commodity?
一种商品现价是1800元，比原价降低了10%，这种商品原价是多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1_800 / (9/10)</gadget>
<output>2_000</output>

<result>2_000</result>