Yes, but a lot of luck required.
As
ph has just said, the slot at idle with flap is quite steep. Not quite Space Shuttle, but up there. The other hassle is that the B747 is really "fly-by-fluid". 160kts as a minimum to keep the hydraulic pumps working to provide enough pressure to keep the flight controls operating.
Having said that, if you're high enough, you can take flap and gear but they are S - L - O - W to operate. You have to allow each selection to take full effect then select the next. LE devices have their own issue in this and add to the flavour.
Very much a case of "don't try this at home!!"
G'day
