function calcKoverI( k, i ) {

	let nom = 1;

	for ( let j = 2; j <= k; ++ j ) {

		nom *= j;

	}

	let denom = 1;

	for ( let j = 2; j <= i; ++ j ) {

		denom *= j;

	}

	for ( let j = 2; j <= k - i; ++ j ) {

		denom *= j;

	}

	return nom / denom;

}
Calculates "K over I".

@param {number} k - The K value.
@param {number} i - The I value.
@return {number} k!/(i!(k-i)!)