There are 10 students lined up in a column, counting from the back to the front, Xiao Ming ranks fourth, then counting from the front to the back, what is the number of Xiao Ming's rank.
有10个同学排成一列纵队，从后面向前数小明排第4个，那么从前面向后数小明排第多少个．
<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>