The number whose (2/7) is less than a number is 258, what is this number?
比一个数少它的(2/7)的数是258，这个数是多少？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">258 / (5/7)</gadget>
<output>1_806/5 = around 361.2</output>

<result>1_806/5 = around 361.2</result>