$${\frac{{\mathtt{4}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{3.14}}$$
We all know that 3.14 is equal to 22/7
so, we dont have to after all try to make 4/3 a decimal, cuz you can make 3.14 a fraction
$$\left({\frac{{\mathtt{4}}}{{\mathtt{3}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{22}}}{{\mathtt{7}}}}\right)$$
no cross cancelling can be done sadly
so 4*22=88
3*7=21
now, its 88/21
if you however want to try to make me not be lazy and make me convert it to a mixed number fraction:
21 would go in 88 4 times
21*4=84
4 additional pieces of 88 are included
overall answer:
4 4/21 or 88/21