A set of tea sets costs 360 yuan after a 10% discount. What is the original price of this set of tea sets?
一套茶具，打九折后360元，这套茶具的原价是多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">360 / (9/10)</gadget>
<output>400</output>

<result>400</result>