The original price of the rice cooker is 258 yuan, and now it is on sale with a 10% discount. How much can you save by buying this kind of rice cooker than before the discount?
电饭煲原价258元，现在打九折出售，买一个这种电饭煲可以比打折前少花多少钱？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">258 * (1/10)</gadget>
<output>129/5 = around 25.8</output>

<result>129/5 = around 25.8</result>