 
 <prompt> Mr Julien's duk store ya kunshi 400 marbles bayan an kai waɗannan minti biyu. Ashirin na mutane suka zo cikin store, kuma kowace ya sami 15 marbles. Me ya kai a cikin store? <response>: ```Idan kullum daga 20 na kasashen suka samu 15 marbles, to suka samu 20 * 15 = 300 marbles daga dukiyar Mr Julien.
Sauƙi na marbles da aka samu a dukiyar shine 400-300 = 100 marbles

Sami ne 100.``` 