This bit is correct: "they've paid 30% tax on 56% of your...

This bit is correct:

"they've paid 30% tax on 56% of your shares"

What percentage you pay on all of the dividend when you do your tax return depends on your particular circumstances. Let's say you held a 1,000 shares.

Dividend received would be 1,000 x 94 cps = $940
Franking credit = 1,000 x 94 cps x 56% x 30/70 = $225.60, say $226.
Total "gross" dividend = $940 + $226 = $1,166

Here are two examples of what happens to your tax situation depending on your effective tax rate:

a. If you are below the tax free threshold you pay zero tax, so you will get all of the franking credit as a refund.

b. If your effective tax rate is 40 %, the tax due is worked out as follows:

Tax on dividend = $1,166 x 40% = $466
Of this, $226 was deducted at source in the form of corporation tax by ANZ so you will have to pay a balance of 466-226 = $240 to the ATO.

Note that even in the case of a fully franked dividend, you might have to pay more tax if your effective tax rate is more than 30%. Let's say the dividend was 81 cps fully franked.

Your dividend received would be 1,000 x 81 cps = AU$810
Franking credit = 1,000 x 81 cps x 30/70 = AU$347
Total "gross" dividend = $810 + $347 = $1,157

If your tax rate is 40% as in b. above, the tax due would be:
Tax on dividend = $1,157 x 40% = $463.
$347 already paid as franking credit so additional tax payable would be $116.

This will be worked out by the ATO tax return software so you don't need to do the accounting yourself.

Disc- Not intended to be advice, etc, etc.