what is 6 multiplied by 6 with a power of 7

Not quite MG  powers must be done before multiply

$${\mathtt{6}}{\mathtt{\,\times\,}}{{\mathtt{6}}}^{{\mathtt{7}}} = {\mathtt{1\,679\,616}}$$

$${\mathtt{6}}{\mathtt{\,\times\,}}{\mathtt{6}} = {\mathtt{36}}$$

$${{\mathtt{36}}}^{{\mathtt{7}}} = {\mathtt{78\,364\,164\,096}}$$