Students do radio gymnastics, if there is one more person standing in the 4th row, and if there is one more person standing in the 6th row, at least how many people do the exercises?
同学们做广播体操，如果站4排多1人，如果站6排还多1人，至少有多少人做操？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<gadget id="calculator">12 + 1</gadget>
<output>13</output>

<result>13</result>