Help me in solving PYPRACMCQ9 problem

help
,
1

My issue

how (7,3) is 111 [7+13+(7.13)=20+7.13=27.13

Learning course: Practice Python
Problem Link: CodeChef: Practical coding for everyone

2

20+7.13= 20+91 =111
you should follow the rules of mathematics…
Multiply the number before addition