A soccer ball is 68 yuan. Now it is on promotion, and it is on sale with a 10% discount. What is the current price?
一个足球68元，现在搞促销，九折出售，现价多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">68 * (9/10)</gadget>
<output>306/5 = around 61.2</output>

<result>306/5 = around 61.2</result>