Half a large can of tinned spaghetti hoops is 21.4grams of carbs. So not too bad if it’s the only thing you eat. A whole can, or putting it on toast would be a lot of carbs.
Are you able to use the information to make better choices? Do you cook yourself or does someone else do all the cooking? If someone else does your cooking it may be useful to show it to them too.
greggs menu carb wise: 24g per sausage roll https://www.greggs.com/menu/product/sausage-roll-1000446
lots of big chains have the nutritional info for many of their products handy for when eating out and about a quick search on the chains webpages (uk versions of sites should list values as net carbs)