The result implies that you did not have $0 in traditional IRAs at the end of 2022 but instead had $8,154 in traditional IRAs. That would make the nontaxable amount of your $9,800 of Roth conversions be:
$9,800 * $6,000 / ($9,800 + $8,154) = $3,275
The taxable amount is then:
$9,800 - $3,275 = $6,525
and $2,725 of basis in nondeductible traditional IRA contributions remains in your traditional IRA(s) to be applied to future distributions.
