Incorrect. That would be the reciprocal (aka the multiplicative inverse). Opposite is the same as negative. You can ask a math teacher if you wish. The opposite of a number is the ADDITIVE INVERSE (not the multiplicative inverse). This is obtained by multiplying the number by -1.
On an on-topic note, I’ve gotten one step into it…I’ve downloaded it. Now to actually work on it…this will take awhile.