Xiao Pang and Xiao Ding Ding set off from the school to the museum which is 1200 meters apart. Fatty set off first at 10:00 in the morning, followed by Ding Ding. As a result, they both arrived at their destination at 10:24 in the morning. It is known that Ding Ding walks 10 meters more per minute than Pang Ding. How many minutes did Little Ding Ding leave later than Xiaopang?
小胖和小丁丁从学校出发去相距1200米的博物馆．小胖在上午10：00先出发，小丁丁后出发，结果两个人在上午10：24同时到达目的地．已知小丁丁每分钟比小胖每分钟多走10米．小丁丁比小胖晚出发几分钟？
<gadget id="calculator">1_200 / 24</gadget>
<output>50</output>

<gadget id="calculator">50 + 10</gadget>
<output>60</output>

<gadget id="calculator">1_200 / 60</gadget>
<output>20</output>

<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<result>4</result>