The black and white teams are blocked outside the castle by a password door, as long as they enter the correct password, they can enter the castle smoothly. There is a password reminder engraved on the door: a※b=a*b+ab, (5※2)※x=49; then, what is the number represented by the password x.
黑白团队被一道密码门拦在城堡外面，只要输入正确的密码就能顺利的进入城堡．门上刻有密码提示：a※b=a*b+a-b，(5※2)※x=49；那么，密码x表示的数是多少．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<gadget id="calculator">49 - 13</gadget>
<output>36</output>

<gadget id="calculator">36 / 12</gadget>
<output>3</output>

<result>3</result>