I should use this approximation in order to find the value of this combination of 78 elements, class 19 without using a calculator. I have no idea how can I write n! in another way in order to use it. Please help me! Thanks! 
2026-03-31 18:19:29.1774981169
Aproximation lg(n!)=n(lgn)-0.434)
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$$y=\binom{78}{19}$$ $$=>y=\frac{78!}{19!\times59!}$$ $$=>\lg{y}=\lg{78!}-\lg{19!}+\lg{59!}$$
$$y=10^{\lg{78!}-\lg{19!}+\lg{59!}}$$
Now you can use the approximation formula to calculate the rest of it.