hello!
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Use the Distributive Property, which states:-
![\bigstar{\underline{\boxed{\pmb{a(b+c)=ab+ac}}}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mozkvuob55hk4zdo8s6no7c9gfnqzsy13m.png)
Where
we distribute a by multiplying it times b & c
Simplify:
6(10k)
Distribute 6:-
![\longrightarrow\sf{60k}](https://img.qammunity.org/2020/formulas/mathematics/middle-school/myovunus1qha06fu47cxcybcjv5mnj8toj.png)
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note:-
Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I'll comment and/or edit my answer :)