The number of chess pieces in a pile is within 100 pieces, if there are 3 pieces, there is 1 piece, if there are 5 pieces, there are 2 pieces, and if there are 7 pieces, there are 2 pieces, then, how many pieces are in this pile.
一堆棋子数在100粒之内，3粒一数余1粒，5粒一数余2粒，7粒一数余2粒，那么，这堆棋子是多少粒．
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 + 2</gadget>
<output>37</output>

<result>37</result>