How many lanterns should be hung at the entrance of a 100-meter-long shopping plaza at Christmas, starting from one end at intervals of 2 meters?
圣诞节在一座100米长的购物广场门口挂彩灯，从一端起，每隔2米挂一盏，一共要挂多少盏彩灯？
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 + 1</gadget>
<output>51</output>

<result>51</result>