△ in the following formula represents a number, what is the number. △*17-△/△+2=3401.
下式中的△表示一个数，这个数是多少．△*17一△/△+2=3401．
<gadget id="calculator">1 - 2</gadget>
<output>-1</output>

<gadget id="calculator">3_401 + (-1)</gadget>
<output>3_400</output>

<gadget id="calculator">3_400 / 17</gadget>
<output>200</output>

<result>200</result>