Please help with number one.

What is the quotient of 42/3 divided by 4 1/5

If your annual gross income is $62,000 and you have one monthly car payment of $335 and a monthly student loan payment of $225, what is the maximum house payment you can afford. consider a standard 28% front-end ratio and a 36% back-end ratio. also, to complete your calculation, the annual property tax will be $3,600 and the annual homeowner's premium will be $360.

How to use order of operation in 20 divide by 4 multiply 5 = 1