In a box of Go pieces, if there are three or three, two more than five, five or five, four or more, seven or seven, six or more. If the number of Go pieces in this box is between 200 and 300, how many are there? Go pieces?
一盒围棋子，三只三只数多二只，五只五只数多四只，七只七只数多六只，若此盒围棋子的个数在200到300之间，问有多少围棋子？
<gadget id="calculator">3 * 5 * 7</gadget>
<output>105</output>

<gadget id="calculator">105 * 2</gadget>
<output>210</output>

<gadget id="calculator">210 - 1</gadget>
<output>209</output>

<result>209</result>