Xiao Ming is waiting in line for the "Whirlwind Adventure" in the playground. Counting from front to back, he ranks 3rd, and counting from back to front, he ranks 5th. How many people are waiting for this project?
小明在排队等候游乐场的"激流探险"．从前往后数，他排第3，从后往前数，他排第5．这个项目一共有几人在等候？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<result>7</result>