Write a function to find the division of first even and odd number of a given list.
def div_even_odd(list1):
    first_even = next((el for el in list1 if el%2==0),-1)
    first_odd = next((el for el in list1 if el%2!=0),-1)
    return (first_even/first_odd)
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a function to find the division of first even and odd number of a given list.
def div_even_odd(list1):
    first_even = next((el for el in list1 if el%2==0),-1)
    first_odd = next((el for el in list1 if el%2!=0),-1)
    return (first_even/first_odd)[/INST]assert div_even_odd([1,3,5,7,4,1,6,8])==4
assert div_even_odd([1,2,3,4,5,6,7,8,9,10])==2
assert div_even_odd([1,5,7,9,10])==10</s>