The skipping rope is 18 yuan per silver, and the school bought 205 skipping ropes. How much did it cost in total?
每银跳绳18元，学校买了205根跳绳，一共花了多少钱？
<gadget id="calculator">18 * 205</gadget>
<output>3_690</output>

<result>3_690</result>