The original price of a radio is 100 yuan. Now the price is reduced by 10%. What is the current price?
一台收音机原价100元，现在降价10%，现在售价是多少元．
<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">100 * (9/10)</gadget>
<output>90</output>

<result>90</result>